Heater



G. W. COEN.

HEATER APPLICATION FILED MAY I9. I919.

2 SHEETS-SHEET l.

[N V EN TOR Iii/V67 W. C 06 Patented June 22, 1920..

G; W. COEN.

HEATER APPLICATION FILED MAY I9, 1919.

2 SHEETS-SHEET 2.

............. Fla; 2.

IN V EN TOR 6/967' Ml. (Of/V.

ATTORNEYS Patented June 22, 1920.

PATIENT OFFICE.

.GABNET W. COEN, OF SAN FRANCISCO, CALIFORNIA.

HEATER.

Specification of Letters Patent. P t t J 22 2 Application filed May 19, 1919. Serial No. 298,280.

To all whom it may concern:

Be it known that I, GARNET W. ,COEN, a citizen of the United States, residing at the city and county of San Francisco and State of California, have invented new and useful Improvement in Heaters, of which the fol lowing is a specification.

This invention'relates to steam actuated liquid heaters and especially to fuel oil heaters.

One of the objects of the present invention is to provide a simple, substantial, easily assembled and cheaply manufactured liquid heater, especially adapted for pro-heating fuel oils and the like, and particularly a heater which will insure a uniform heating and ample supply of the liquid handled and do so in an efficient manner by reducing the loss of heat by radiation.

Another object ofthe invention is to provide a novel construction which eliminates joints of all kinds and in which the several parts contained may freely expand with relation to eachother, thereby reducing the possibility of leakage to a minimum.

Another object of the invention is to provide a novel construction whereby the liquid acquires its preliminary heat while in the form of a rapidly moving film or ribbon, it being recognized that the transfer of heat to a liquid body and particularly to oil, is much more rapid if the liquid is spread out over a large surface or maintained in a thin film.

Still another object of the invention is to provide a construction wherein strength and compactness are combined with light welght, by the use of welded joints employed in such a manner that expansion and contraction strains are eliminated.

Further objects will hereinafter appear.

The invention consists of the parts and the construction, combination and arrangement of'parts as hereinafter more fully described and claimed, having reference to the accompanying drawings, in which Figure 1 is a side elevation showing a plurality of heaters connected to operate in unison.

Fig. 2 is a central vertical section through one of the heaters.

Referring to the drawings in detail, and particularly to Fig.2, A and B indicate a pair of cylindrical casings, one positioned exterior of the other, said casings being of such diameter that an annular space 2 is formed between the same. The lower ends of'the casings are in this instance supported by a single head member, as indicated-at 3, wh le the upper ends are provided with separate head sections, as indicated at l and 5.

Formed on the exterior surface of the inner cylindrical casing B is a helical spacing member 6 which is provided for the purpose of forming a helical path for the incoming oil, as will hereinafter be described.

Mounted interior of the inner cylindrical casing B is'a coiled tubing 7. The upper end of this tube is secured in the head member 5, as shown at 8, while the lower end is In actual operation I generally employ a plurality of heating units such as shown in ig. 1, the oil supply pipe shown at 14. being in that instance connected with the respective openings 12 formed in the exterior cylindrical casing A. The steam supply pipe shown at 15 is connected with the admission pipes 10 while the condensate outlets are connected with a return pipe 16. The heated oil discharging from the coils 7 is delivered to a pipe 17 which in turn conveys it to an oil burner or to any point required.

In actual practice, with oil admitted through the openings indicated at12, it will readily be seen that it will pass through the annular space 2 formed between the inner and outer casings and that it will travel in a helical path and in a comparatively thin rib-a bon while passing through this space. The

oil is in this manner exposed to a comparatively large heated area and as the film is thin, it can readily be seen that considerable heat will be absorbed before it enters the spacing formed between 'the'head members .4 and 5., The oil will at this vpointenter the upper end of the coil 7 through the connection 8' and will then pass-downwardly throu h said coil and finally discharge into pipe 1 through the connection 9, the oil during its passage through coil 7 being exposed to the steam supplied by means of the pipes 15 and 10. The manner of circulating the oil is of considerableimportance as the incoming cold oil serves as an insulator and absorbent-of heat which would otherwise be wasted. It therefore absorbs considerable heat, due to the thin film. or ribbon formation assumed and finally obtains the desired tem )erature during its passage through coil ractically all losses by conduction or radiation are in this manner eliminated and an el'licient economical heating is obtained.

Another important feature of the present invention is the construction involved. By referring to Fig. 2, it will be seen that the helical member 6 is secured to the inner casing section only. The casing sections may therefore freely expand or contract with relation to each other without imparting strains to the structure involved.

Furthermore, it can readily be seen that all joints may be welded, thus reducing the expense of construction involved to a minimum, the only screw connections employed in an installation of the character here shown being those formed between the pipe connections 14L, 15, 16 and 17 and the several heating units employed. There are no screw connections in any heating unit as all connections are formed by nipples such as shown at 9, 11 and 12, which are welded directly to the heater as shown.

WVhile steam is here shown as employed for the purpose of heating the oil, I wish it understood that any other suitable heating medium may be employed. For instance, it is very possible that a burner might be placed in the lower end of the cylindrical casing B and that a stack or other outlet may be formed in the upper end of the cylindrical casings. Further, I wish it understood that the materials and finish of the several parts employed may be such as the experience and judgment of the manufacturer may dictate.

Having thus described my invention, what I claim and desire to secure by Letters Patent is 2- 1. In a heater of the character described, a casing having an exterior and an interior chamber formed therein, said chambers being inclosed and separated, means for cir culating a heating medium through the interior chamber, and means for circulating oil both through the exterior and the interior chamber.

2. In a heater of the character described, a casing having an exterior and an. interior chamber formed therein, said chambers being inclosed and separated, means for circulating a heating medium through thein} terior chamber, means for delivering oil to be heated to the exterior chamber and a discharge conduit for the oil, said conduit passing through the interior chamber.

3. A heater comprising an exterior and an interior casing, said casings being spaced apart to form an inner chamber and an annular exterior chamber, a coiled tubing mounted within the interior chamber having one end connected with the exterior annular chamber and the opposite end connected wlth a discharge pipe, means for admitting a liquid to the annular exterior chamber, and means for maintaining the liquid in a thin film and for imparting a helical movement thereto when passing through the annular exterior chamber.

5. A heater comprising an exterior and an interior casing,- said casings being spaced apart to form an inner chamber and an annular exterior chamber, a coiled tubing mounted within the interior chamber having one end connected with the exterior annular chamber and the opposite end connected with a discharge pipe, means for admitting a liquid to the annular exterior chamber, means for maintaining the liquid in a thin film and for imparting a helical movement thereto when passing through the annular exterior chamber, and means for supplying heat to the interior chamber.

6. A heater comprising an exterior and an interior casing, said casings being spaced apart to form an inner chamber and an annular exterior chamber, a coiled tubing mounted within the interior chamber having one end connected with the exterior annular chamber and the opposite end connected with a discharge pipe, means for admitting a liquid to the annular exterior chamber, and a guide member formed in the annular exterior chamber adapted to impart a helical movement to the liquid during its passage through the annular exterior chamber.

7. A heater comprising an exterior and an interior casing, said casings being spaced apart to form an inner chamber and an annular exterior chamber, a coiled tubing mounted within the interior chamber having one end connected with the exterior annular chamber and the opposite end connected with a discharge pipe, means for admitting a liquid to the annular exterior chamher, and a helical guide member formed between the two casing sections to impart a helical movement to. the liquid during its passage through the exterior annular chamber.

8. A heater comprising an exterior and an interior casing, said casings being spaced apart to form an inner chamber and an annular exterior chamber, a coiled tubing mounted within the interior chamber having one end connected with the exterior annular chamber and the opposite end connected with a discharge pipe, means for admitting a liquid to the annular exterior chamber, a helical guide member formed between the two casing sections to impart a helical movement to the liquid during its passage through the exterior annular chamber, a pipe entering the interior chamber and centrally positioned therein, and means for ad mitting steam through said pipe.

9. A heater comprising an exterior and an interior cylindrical-shaped casing, said casings being spaced apart to form an inner chamber and an annular exterior chamber. a head member forming a closure for the lower end of said casings, separate head members forming closures for the upper ends of the casing sections, a coiled tubing mounted within the interior chamber, said tubing being connected at its upper end with the inner head member to communicate with the exterior annular chamber, and said tubing haying its lower end connected with a discharge opening formed in the lower head member, a helical guide member secured to the exterior wall of the inner casing section, said helical guide member forming a helical passage in the annular exterior chamber which communicates with the upper end of the coiled tubing, means for admitting a liquid to be heated to the lower end of the helical passage, and means for heating the interior chamber.

10. A heater comprising an exterior and an interior cylindrical-shaped casing, said casings being spaced apart to form an inner chamber and an annular exterior chamber, a head member forming a closure for the lower end of said casings, separate head members forming closures for the upper ends of the casing sections, a coiled tubing mounted within the interior chamber, said tubing being connected at its upper end with the inner head member to communicate with the exterior annular chamber, and said tubing having its lower end connected with a discharge opening formed in the lower head member, a helical guide member secured to the exterior wall of the inner casing section, said helical guide member forming a helical passage in the annular exterior chamber which communicates with the upper end of the coiled tubing, means for admitting a liquid to be heated to the lower end of the helical passage, a pipe secured in the lower head member centrally positioned within the interior chamber and extending to the upper end thereof, means for admitting steam through said pipe, and a. condensate discharge opening formed in the lower head member for the discharge of the steam.

11. In a heater of the character described exterior and interior concentric cylindrical casings having a base common to both and independent interspaced head members, a helical passage formed between the two casings, means to admit liquid to be heated into said passage, a spiral tubing in the inner casing connected at the upper end with the inner head member at the upper terminal space of the helical passage, and at the lower end with a discharge opening formed in the common base member, andmeans for circulating a heating medium through the inner casin 12. In a heater of the character described exterior and interior concentric cylindrical casings having a base common to both and independent interspaced head members, a spiral ribbon member extending from bottom to top between the casings, forming a helical passage therebetween, said spiral ribbon member being secured to only one casing member to permit independent expansion of the separate casings, means for circulating a fluid through the helical passageway, and means for circulating a heating medium through the inner casing.

In testimony whereof I have hereunto set my hand in the presence of a subscribing witness.

\ GARNET w. COEN. Witness:

JOHN H. HERRING. 

